Curved 18mm Oxygen Sensor Weld-On Bung & Plug, O2 Boss, M18 x 1.5 Thread S304

• M18 x 1.5 Oxygen Sensor Bung – Universal weld-on boss for installing standard O2 sensors.
• Curved Saddle Design – Pre-curved base for easy fitment on round exhaust pipes, headers, or dump pipes.
• Includes Matching Plug – Blank-off plug supplied for sealing when the sensor is not in use.

This 18mm (M18 x 1.5) weld-on oxygen sensor bung with plug is designed for adding or relocating an O2 sensor port on exhaust pipes. The curved saddle makes it ideal for mounting on round tubing, ensuring a strong weld. It’s perfect for wideband sensor installation, tuning, or blanking off an unused port.

Made from S304 stainless steel, this bung and plug set is corrosion-resistant and suitable for high-temperature, high-performance exhaust systems, including turbo setups.

Specifications:

• Brand: GASO
• Thread Size: M18 x 1.5 (Standard O2 Sensor Thread)
• Design: Weld-on bung with curved saddle
• Material: S304 Stainless Steel
• Includes: Bung + Matching Blank-off Plug
• Use: Universal – Exhaust fabrication, O2/wideband sensor installation or plug-off

Ideal for custom exhausts, turbo manifolds, wideband installations, and any application that needs a secure O2 sensor port.

For more fabrication components and exhaust accessories, explore our oxygen sensor exhaust accessories collection.